Converting a carport to a garage - Profitable?

A lot of the properties I am looking at have carports.  I plan to do a live in renovation, and I personally need a garage.  It's hard to find properties with garages in my price range though.

In cases like the attached pictures(where the carport is integrated into the home's roof) would it make sense to convert the carport into a garage?

This seems like a reasonable DIY project.  I basically need to frame walls, and have a door installed.   

Any thoughts? Could this be a positive ROI?

Thanks all